Cities in State of Illinois, United States ( 474 )
- Lake Bluff
- Lake Forest, Illinois
- Lake in the Hills
- Lake of the Woods
- Lake Villa, Illinois
- Lake Zurich, Illinois
- Lakemoor
- Lakewood, Illinois
- Lansing
- LaSalle, Illinois
- Lawrenceville, Illinois
- Le Roy, Illinois
- Lebanon, Illinois
- Lemont, Illinois
- Lena, Illinois
- Libertyville
- Limestone, Illinois
- Lincoln, Illinois
- Lincolnshire, Illinois
- Lincolnwood
- Lindenhurst, Illinois
- Lisle, Illinois
- Litchfield, Illinois
- Lockport, Illinois
- Lombard, Illinois
- Long Grove, Illinois
- Long Lake, Illinois
- Loves Park
- Lynwood, Illinois
- Lynwood, Illinois
- Lyons, Illinois
- Machesney Park
- Macomb, Illinois
- Madison, Illinois
- Mahomet, Illinois
- Manhattan, Illinois